lh-20BNC²³⁶²¹³⁺¹ 例句 From the extracts, 18 compounds were isolated by column chromatogram on silica gel VLC, Sephadex LH-20 and RP-18, followed by reverse-phase HPLC and recrystallization. 采用柱层析、薄层层析、高效液相等方法,对采自中国青岛沿海的绿藻孔石莼的化学成分进行了研究,共得到18个单体化合物。 fabiao